P0520-OIL PRESS SENSOR CKT MALF SIGNAL VOLTAGE TOO HIGH
For a complete wiring diagram Refer to Section 8W
- When Monitored:
With the engine running.
- Set Condition:
The Oil Pressure Sensor signal is above 4.8 volts for 0.5 second.
| Possible Causes |
| ENGINE OIL PRESSURE SENSOR |
| BCM - OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| BCM - OIL PRESSURE SENSOR SIGNAL OPEN |
| OIL PRESSURE SENSOR SIGNAL CIRCUIT OPEN |
| OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| SENSOR GROUND CIRCUIT OPEN |
| INTERMITTENT CONDITION |
Diagnostic Test
1. CHECK FOR CURRENT DTCNOTE: If DTC P0641, P0651 or P0697 is present with this DTC, diagnose DTCs P0641, P0651 or P0697 before diagnosing this DTC.
NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Start the engine several times, letting the engine run for at least 30 seconds at a time.
With the scan tool, read ECM DTCs.
Did this DTC set again?
Yes
- Go To2
No
- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
2. CHECK OIL PRESSURE SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the Oil Pressure Sensor harness connector.
Turn the ignition on.
Measure the voltage of the Oil Pressure Sensor Signal circuit.
Select the appropriate voltage reading.
Voltage is above 5.5 volts.
- Go To3
Voltage is between 4.7 and 5.4 volts.
- Go To4
Voltage is below 4.7 volts.
- Go To5
3. OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the BCM harness connectors.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage of the Oil Pressure Sensor Signal circuit.
Is the voltage below 1.0 volt?
Yes
- Replace and program the Front Control Module in accordance with the Service Information.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
- Repair the Oil Pressure Sensor Signal circuit for a short to voltage.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
4. SENSOR GROUND CIRCUIT OPEN
Turn the ignition off.
Disconnect the BCM harness connectors.
Measure the resistance of the Sensor Ground circuit.
Is the resistance below 10.0 ohms?
Yes
- Replace the Engine Oil Pressure Sensor.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
- Repair the Sensor Ground circuit for an open.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
5. OIL PRESSURE SENSOR SIGNAL CIRCUIT OPEN
Turn the ignition off.
Disconnect the BCM harness connectors.
Disconnect the Oil Pressure Sensor harness connector.
Measure the resistance of the Oil Pressure Sensor Signal circuit.
Is the resistance below 10.0 ohms?
Yes
- Replace and program the Body Control Module in accordance with the Service Information.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
- Repair the Oil Pressure Sensor Signal circuit for an open.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).